If the half-time of krypton-81 is 229,00 years, how much krypton-81 was present when the ice first formed

Before the use of systematic names, many compounds had common names. Give the systematic name for each of the following: (a) blue vitriol, CuSO4° 5H20; (b) slaked lime, Ca (OH) 2; (c) oil of vitriol, H2804;

The less energy a wave has, the greater its amplitude. True or False

How many chromsomes does an elephant egg have?

What is the frequency of green light that has a wavelength of 5.14 x 10^-7m?

Organic acids are called what

How many orbitals are there in the shell with n = 4?

Using the balanced equation shown below, calculate the mass of c3h8 that must react in order to release 2.45*106 * 106 kj of heat. δhrxn = - 2219.9 kj

True or False Aluminum does not perform well at elevated temperatures

What is its pressure if its volume is changed to 10.1 L? Express your answer using two significant figures.

Which spheres are interacting when a volcano irrupt and gas is released into the air